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Abstract <p>The compound Bi<sub>1.3</sub>Yb<sub>0.7</sub>O<sub>3</sub> was prepared by solid-phase reactions. The compound had a cubic structure, space group <i>Fm</i>3<i>m</i>, with the unit cell parameter <i>a</i> = 0.54202 nm. The solution enthalpy of Bi<sub>1.3</sub>Yb<sub>0.7</sub>O<sub>3</sub> as measured by solution calorimetry in 2 M HCl was Δ<sub>sol</sub><i>H</i> <sup>0</sup> = −227.8 ± 6.3 kJ/mol. The measured enthalpy of solution was used to calculate the standard enthalpy of Bi<sub>1.3</sub>Yb<sub>0.7</sub>O<sub>3</sub> formation as Δ<sub>f</sub><i>H</i> <sup>0</sup> = −996.0 ± 7.9 kJ/mol. The lattice enthalpy for Bi<sub>1.3</sub>Yb<sub>0.7</sub>O<sub>3</sub> was calculated using the Born–Haber cycle as Δ<sub>lat</sub><i>H</i> <sup>0</sup> = −13278 kJ/mol.</p>

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Bismuth and Ytterbium Oxide Compounds: Preparation and Thermodynamics

  • 期刊论文

  • 发表日期：

    2025年8月1日

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  • N. I. Matskevich,
  • E. R. Elbaev,
  • A. N. Semerikova,
  • A. Yu. Manakov,
  • L. M. Levchenko,
  • A. A. Shapovalova,
  • V. P. Zaitsev,
  • E. N. Tkachev

摘要

Abstract

The compound Bi1.3Yb0.7O3 was prepared by solid-phase reactions. The compound had a cubic structure, space group Fm3m, with the unit cell parameter a = 0.54202 nm. The solution enthalpy of Bi1.3Yb0.7O3 as measured by solution calorimetry in 2 M HCl was ΔsolH 0 = −227.8 ± 6.3 kJ/mol. The measured enthalpy of solution was used to calculate the standard enthalpy of Bi1.3Yb0.7O3 formation as ΔfH 0 = −996.0 ± 7.9 kJ/mol. The lattice enthalpy for Bi1.3Yb0.7O3 was calculated using the Born–Haber cycle as ΔlatH 0 = −13278 kJ/mol.